island vs St. Christopher

island and St. Christopher both are nouns.

Word	Noun	Adjective	Verb	Adverb
island	Yes	No	No	No
St. Christopher	Yes	No	No	No

island (noun)	St. Christopher (noun)
a zone or area resembling an island	the largest of the islands comprising Saint Christopher-Nevis
a land mass (smaller than a continent) that is surrounded by water	Christian martyr and patron saint of travellers (3rd century)